Best Sleeping Bags · Sea to Summit · Updated June 2026
Spark SpII Ultralight Down Sleeping Bag: specs and price (2026)
Spark SpII Ultralight Down Sleeping Bag has a US price of $409 (MSRP per advnture.com review citing Sea to Summit US pricing). Below is its full, sourced spec sheet — every value links to the source and the date we captured it.
Specifications
| Price (US) | $409 MSRP per advnture.com review citing Sea to Summit US pricing |
|---|---|
| Brand | Sea to Summit |
| Released | — |
| temperature rating f | 28 |
| insulation type | down |
| fill power | 850 |
| shape | mummy |
| packed weight lb | 1.17 |
| packed size | 2.5 L (approx. 1-liter bottle size) |
| zipper side | — |
| product note | Lower limit 28F / -2C; comfort 38F / 4C; Ultra-Dry Down PFAS-free treatment; regular size; 530 g / 18.7 oz |
Source: advnture.com (verified 2026-06-20) · corroborated by backcountry.com. Verified: lower limit 28F / comfort 38F, 850+ FP Ultra-Dry Down, regular weight 530 g (18.7 oz / 1.17 lb), packed ~2.5 L, price $409 confirmed via Advnture review and corroborated by Backcountry. Zipper side not determinable; left null. Corroboration URL updated to Backcountry.
Frequently asked questions
How much does the Spark SpII Ultralight Down Sleeping Bag cost?
The Spark SpII Ultralight Down Sleeping Bag has a US price of $409 (MSRP per advnture.com review citing Sea to Summit US pricing), as of 2026-06-20.
What are the Spark SpII Ultralight Down Sleeping Bag's key specs?
Spark SpII Ultralight Down Sleeping Bag (Sea to Summit): temperature rating f 28, insulation type down, fill power 850, shape mummy, packed weight lb 1.17. Full sourced spec sheet verified 2026-06-20.